Heat flux barbecue burner

Abstract

The present invention discloses a heat flux barbecue burner. A housing has a drainage cavity, and a heat outlet is formed at a top of the housing. A base body is located in the drainage cavity of the housing. An ejecting tube is located in the drainage cavity of the housing and arranged above a nozzle on the base body, and a combustion port is formed at a top end of the ejecting tube. A flame projector is arranged at the combustion port of the ejecting tube. The present invention minimizes the gas flow resistance in the ejecting tube, enhancing the ejection effect.

What is claimed is: 
     
         1 . A heat flux barbecue burner, comprising:
 a housing having a drainage cavity, wherein a heat outlet in communication with the drainage cavity is formed at a top of the housing;   a base body located in the drainage cavity of the housing and provided with a nozzle;   an ejecting tube located in the drainage cavity of the housing and arranged above the nozzle on the base body, wherein an inner cavity of the ejecting tube is in a rotator structure, and a combustion port is formed at a top end of the ejecting tube and faces the heat outlet of the housing; and   a flame projector arranged at the combustion port of the ejecting tube, wherein an inner cavity of the flame projector comprises a diffuser section distal to the ejecting tube and a contraction section proximal to the ejecting tube, the diffuser section expands from one end proximal to the ejecting tube to the other end distal to the ejecting tube, so that a diameter of the end of the diffuser section proximal to the ejecting tube is less than a diameter of the other end distal to the ejecting tube, and the contraction section expands from one end proximal to the diffuser section to the other end distal to the diffuser section, so that a diameter of the end of the contraction section proximal to the diffuser section is less than a diameter of the other end distal to the diffuser section.   
     
     
         2 . The heat flux barbecue burner according to  claim 1 , wherein the inner cavity of the ejecting tube comprises a converging section proximal to the nozzle and a diverging section distal to the nozzle, the converging section tapers from one end proximal to the nozzle to the other end distal to the nozzle, so that a diameter of the end of the converging section proximal to the nozzle is greater than a diameter of the other end distal to the nozzle, the diverging section expands from one end proximal to the converging section to the other end distal to the converging section, so that a diameter of the end of the diverging section proximal to the converging section is less than a diameter of the other end distal to the converging section, and a combustion port is formed at a top end of the diverging section and faces the heat outlet of the housing. 
     
     
         3 . The heat flux barbecue burner according to  claim 2 , wherein the inner cavity of the ejecting tube further comprises a transition section, the transition section is located between the converging section and the diverging section, and the transition section, the converging section, and the diverging section are in communication with each other. 
     
     
         4 . The heat flux barbecue burner according to  claim 3 , wherein the transition section is a constant-diameter section. 
     
     
         5 . The heat flux barbecue burner according to  claim 2 , wherein the flame projector is provided with a tooth-like structure, a flaming port, and a connection port, the flaming port is located at a large-diameter end of the diffuser section, the tooth-like structure is evenly distributed along a circle of the flaming port, and the connection port is located at a large-diameter end of the contraction section and connected to a port at the other end of the diverging section. 
     
     
         6 . The heat flux barbecue burner according to  claim 5 , wherein a throat is formed at a joint between the diffuser section and the contraction section, a mesh structure is provided at the throat, and a diameter of the throat is less than a diameter of the other end of the diffuser section distal to the diverging section and the diameter of the end of the contraction section proximal to the diffuser section. 
     
     
         7 . The heat flux barbecue burner according to  claim 6 , wherein an inner wall of the flame projector is provided with multiple through holes, the multiple through holes are arranged in an annular array, and two ends of each through hole are located on an inner wall of the contraction section and an inner wall of the diffuser section respectively. 
     
     
         8 . The heat flux barbecue burner according to  claim 7 , wherein a length dimension of the diffuser section is less than a length dimension of the contraction section, and a gradual slope of the contraction section is less than a gradual slope of the diffuser section. 
     
     
         9 . The heat flux barbecue burner according to  claim 1 , wherein a quantity of the ejecting tubes is two or more, the two or more ejecting tubes are arranged side by side, a quantity of the nozzles is equal to the quantity of the ejecting tubes, and positions of the nozzles correspond to positions of the two or more ejecting tubes respectively. 
     
     
         10 . The heat flux barbecue burner according to  claim 9 , wherein the base body is provided with two gas inlet channels, and when the two gas inlet channels are not in communication with each other, one nozzle is in communication with one gas inlet channel for the nozzle to eject gas alone, and the other gas inlet channel is in communication with at least one remaining nozzle for the remaining nozzle to eject gas.